Related Rule
Argentina
Practice Relating to Rule 123. Recording and Notification of Personal Details of Persons Deprived of Their Liberty
Argentina’s Law of War Manual (1969) provides: “Upon the outbreak of a conflict and in all cases of occupation, each of the Parties to the conflict shall institute an official Information Bureau for prisoners of war who are in its power.” It further notes that each of the Parties to the conflict shall give its Bureau the information regarding any enemy person who has fallen into its Power. The manual adds:
The information shall include, in so far as available to the Information Bureau, in respect of each prisoner of war, his surname, first names, rank, army, regimental, personal or serial number, place and full date of birth, indication of the Power on which he depends, first name of the father and maiden name of the mother, name and address of the person to be informed and the address to which correspondence for the prisoner may be sent …
A Central Prisoners of War Information Agency shall be created in a neutral country … The function of the Agency shall be to collect all the information it may obtain through official or private channels respecting prisoners of war, and to transmit it as rapidly as possible to the country of origin of the prisoners of war or to the Power on which they depend. 
Argentina, Leyes de Guerra, RC-46-1, Público, II Edición 1969, Ejército Argentino, Edición original aprobado por el Comandante en Jefe del Ejército, 9 May 1967, §§ 2.101 and 2.102.